Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
Adaptive filter theory (3rd ed.)
Adaptive filter theory (3rd ed.)
Multiuser Detection
On Limits of Wireless Communications in a Fading Environment when UsingMultiple Antennas
Wireless Personal Communications: An International Journal
Fundamentals of wireless communication
Fundamentals of wireless communication
Modern Coding Theory
Projection approximation subspace tracking
IEEE Transactions on Signal Processing
Optimal training signals for MIMO OFDM channel estimation
IEEE Transactions on Wireless Communications
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In this paper issues in the implementation of a recursive least squares (RLS) Multiple-Input Multiple-Output (MIMO) decision-directed channel estimation (DDCE) and tracking algorithm for Spatial Multiplexing are discussed. Problems addressed are a simple calculation of the inverse autocorrelation matrix and schemes of training data or pilot symbols. While there is much work spend in evaluating pilot performances, the choice of pilot symbols cannot be decided based only on simulations. Three proposed schemes are discussed regarding off-the-shelf RF components' compatibility of an experimental MIMO system where polyphase pilots fail to yield good results. Because decision-directed channel estimation is prone to error propagation, we propose a scheme which makes a check on recovered symbol plausability by using the result from the Channel Decoder thus preventing error propagation.